Typewriting machine



2 Sheets-Sheet Original Filed Dec. 6, 1921 June 4, 1929. G. F. ROSE TYPEWRITING MACHINE Opiginal Filed Dec. 1921 2 Sheets-Sheet Patented June 4, 11929.

UNITED STATES 1,715,428 PATENT OFFICE.

GEORGE r. ROSE, or NEW YORK, 111. Y.

TYPEWRITING MACHINE.

Original application filed December a, 1921, Serial No. 520,419. Divided. and this application filed April 17, 1925. Serial No.'23,854.

This invention relates to typewriting ma-- chines and more particularly to the variety comprising an escapement controlled car-' a simple, compact and eflicient construction and arrangement of the carriage escapement and universal bar mechanism for actuating the same.

To these and other ends the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features belng pointed out in the claims at the end of the specification.

In the drawings Figure 1 is a rear elevation, partly broken away, of a typewriting machine embodying the present invention;

Figure 2 is a sectional elevation from front to rear of the same, substantiall on the line 2 a of Figure 1; and

Figure 3 is a view similar to Flgure 2showing the parts however in different posltions.

Similar reference numerals throughout the several views indicate the same parts.

The embodiment of the invention selected for the purposes of the present disclosure to prises a main frame indicated generally at 10,

of the usual or any suitable construction,

' carrying a support or bridge 11, Figure 2. for 40 the key levers shown at 12. The latter have 'pivotally connected with their rear ends links 13 the other ends of which are pivotally connected with type bars 14. The main frame carries also a transverse supporting plate or segp ment member15 on which is fixeda bracket 16 supporting the rear ends of the type bars for pivotal movement about an axis 17. The novel hanger bracket 16for supporting the usual arcua'te pivot wire or bail 17 is formed and secured to member or plate 15 as shown and claimed in my copending application Serial No. 523,317,and the novel key lever bridge is formed and mounted in the frame as shown and claimed in my Letters Patent No. 1,524,885, issued February 3, 1925, the presillustrate the principles involved and a preferred practical application of the same, coment application being a division of my coly so that the pivot wire or bail 17 will lie in a correspondingly inclined plane with the lowest point thereof at approximately the mean level of the key levers 12, thus permitting the bars to extend upwardly and forwardly when at rest without increasing the height of the 65, machine and ali'ording space below the level of the bars for portions of the key levers and for connecting linkage between the key levers and type bars. The key levers have downwardly and rearwardly inclined portions substantially parallel with the bars, said portion of the central levers lying closely belowthe central bars andextending close to the base of the main frame at the rear ends of the levers. On the upper rear portion of the main frame is mounted a work carriage indicated generally at 18 supporting the usual platen roller 19 on which the workis carried. At 20 is indicated a ribbon supporting and feed- 'ing means and at21 is a guide for the ribbon adjacent thevprinting point, It will be observed that the work or platen carriage and the platen thereon are supported above and to the rear of the inclined type bar supporting means and at" a much lower level than is usual in visible writing machines of the swinging bar type, the main frame 10 being quite ,low or flat with its highest point approximately level with the rear or highest bank of keys carried at the forward ends of l the system of fore-and aft extending key levers 12. It will also be observed that the ribbon supporting and feeding means is located forward of the segment plate, in the rear of the free ends of the type bars,.and between the horizontal levels of the upper most point of the platen and the lowermost oint of the frame so as not to increase the height of the machine and so as to occupy the free space aflorded within these bounds by the general arrangement ofthe adjacent parts and devices.

The carriage is supported on the main frame for longitudinal word-spacing, feedingmovement bymeans of the usual or any suitable construction comprising, for example, the usual guide rails 21 movable over a bed plate 31 carried by the usual shift frame (not shown) movable on the main frame to bar on the carriage with which cooperate a pair of pawls 26 and 27. It will be noted that the pulley and spring drum, and also the escapement mechanism comprising the rack and the pair of pawls or dogs cooperating therewith, are all arranged in the space afforded within the rear part of the main frame between the segment member or plate and the rear wall of the frame and between the lower part of the platen carriage and the base of the main frame, and that the lower part of the carriage and the bed plate 31 upon which it is guided are relatively close to the level of the upper edge of the plate 15 and the rear bank of keys and support the'platen at a low point in position to be struck by the type bars aft-er said bars have been turned on their pivots from upwardly and forwardly inclined normal positions substantially at right angles to the plate to upwardly and rearwardly inclined printing position substantially parallel with the plate. Pawl 26 is pivotally supported at its lower end on a spindle or screw 28 carried between spaced ears 29 on a bracket 30 depending from the carriage bed plate 31. Pawl 27 is pivoted on pawl 26 as at 32-and pawl 26 has a laterally projecting arm 33 to which is fixed one end of a tension spring 34 the other end of which is fixed to a bracket 35 extending rearwardly from bracket 30. This spring serves to maintain the pawls in the position shown in Figure 2 with pawl 27 in engagement with the carriage rack. These pawls are connected by spring and stop means or otherwise to pro vide the form of escapement well known in the art, being moved forwardly and backwardly to bring them alternately into engagement with the rack and to permitthe latter and the carriage to move tooth by tooth under the actuation of its spring motor. The means for so moving the pawls comprises in the present instance a bell crank lever 36 pivoted at 37 on a bracket 38extending rearwardly from the transverse wall 15. One

I arm of this lever is positioned for engagement with the lateral arm 33 of pawl 26 and the other arm of the lever carries an adj ustaclose to the carriage bed while the screw-carrying arm of said lever and bracket arm 38 extend under a part of the escapement mechanism. Rod 40 has fixed thereon also a pair of upwardly and rearwardly extending and transversely spaced arms 42 having at their upper ends a loose connection with the rear ends of downwardly and rearwardly extending side arms 44 sliding in openings in wall 15 and carrying in front of the latter a sector 45 so positioned as to be struck by the type bars in the movement of the latter to printing position. The sector 45 and side arms 44 consti tute a universal means or bar guided and supported entirely on plate 15 for oblique movement substantially at right angles to the plane of said plate and the type bar pivots, the

arcuate member 45 of the universal bar lying close to the plate and being located closely above and curved about the pivoted ends of the system of type bars supported on the plate for actuation by the heels of the type bars. Arms 44 move downwardly and rearwardly in paths at opposite sides of the pawls when member 45 is struck by a type bar. The arrangement of escapement and universal bar mechanism shown and described is very conipact but permits the use of substantial and sturdy parts without interference. It also provides a rapid and accurate letter feed mechanism as the escapement is controlled by the heels of the type bars and the universal bar is accurately guided and held against cocking so as to actvon the escapement uniformly irrespective of the position of the type bar in the segmental series of bars. It is evident that as one of the type barsis sobe slidably positioned on the carriage for cooperation with suitable stops on the frame to limit the movement of the carriage.

The present means for locking the carriage in position on the frame-and for disconnectingthe escapement mechanism controlling the movement of the carriage, so that-the force of the spring tending to move the latter is borne by the carriage locking'device. Such means serve to maintain the carriage securely in position ble cont-act screw 38 for engagement with ang so that it cannot be shifted by arring or bodarm 39 fixed on a rod 40 pivotally supported at its ends in downwardly and rearwardly extending brackets 41 on wall 15'. The pawl engaging arm of lever 36 extends upwardly behind the escapement mechanism to a point ily movement of the machine and at the same invention also comprises time, by disconnecting the escapement mechanism, protect the-latter against undue strain and injury. These featuresare particularly advantageous in conjunction with machines of a portable type for safeguarding them during transportation. Such machines are commonly provided with casings for enclosing them during transportation and the present invention comprises, furthermore, a construction and arrangement of parts providing for automatic operation of the carriage locking and mechanism disconnecting devices when the casing is moved to position to enclose the machine.

Referring to the drawings for a more detailed description of these protective features, the lower end of bracket 30 is shown as provided with a rearwardly turned ear 49 on which is movably or pivotally supported, as at 50, a member or lever 51. The latter carries a part or dog 52 having a bevelled upper edge for engagement with any of the notches 47 of the marginal stop bar, when the lever is moved forwardly of the machine, as shown in Figure 3, thus securely locking the carriage in position. Lever 51 is also provided with a finger 53 extending through an opening in bracket 30 into position for engagement with escapement pawl 26, for throwing both pawls forwardly out of engagement with the carriage rack when the lever is moved forwardly as described, thus completely. disconnecting the carriage andthe mechanism controlling its movement. A spring 54 coiled about finger 53 between the lever and bracket 30 serves to normally urge the lever rearwardly to an active position, in which direction its movement is restrained by the hooked forward end of dog 52 which engages with a fixed stop 55 on the frame, as shown in Figure 2. y

The machine is shown in combination with a casin comprising a base portion 56 on which t e machine rests and a cover portion 57 hinged to the base portion at 58. When the cover portion is thrown rearwardly the machine is ready for operation, but when the cover portion of the casing is moved to position for enclosing the machine the rear wall of the cover, which is preferably provided with an abutment 59 for the purpose, engages lever 51, moving the same forwardly andautomatically locking the carriage and disconnecting its controlling mechanism, so that the machine is placed in condition for transportation without danger of injury to its parts. Various modifications of the casing may obviously be employed and adapted in conjunction with lever 51 for actuating the latter as described.

I claim as my invention:

1. In a typewriting; machine, in combination, a base frame, a system of key levers terminating in a keyboard, an upwardly and rearwardly inclined segmentmember, a bail.

curved thereabout having the lowermost position of the arc thereof in a horlzontal plane extending through the said key levers, type p bars pivotally mounted upon said bail, connecting linkage from the key levers to the rearends of the type bars near the pivot bail, arcuate universal means mounted on supports on the rear of the said segment member and actuated from the type bars for movement downwardly and rearwardly and an escape'ment mechanism to the rear of said segment member actuated from said universal means.

2. In a typewriting machine, in combination, a base frame, a system of key levers terminating in a keyboard, a segment member inclining upwardly and rearwardly, a. bail curved thereabout, the rear portions of the key levers inclining downwardly and rearwardly to a pointbelow a horizontal plane passing through the lowermost point of the are of the said bail, type bars pivotally mounted upon said bail and extending upwardly and forwardly and having a throw of approximately degrees from their points of rest to the platen and extending upwardly and rearwardly to the platen when in printing position, connecting linkage from the key levers to the rear ends of the type bars near the pivot bail, arcuate univer sal means mounted on supports on the rear of the same segment member and actuated, from the type bars for movement down- Wardly and rearwardly, and a carriage escapement mechanism to the rear of said se ment member actuated from said universal -means. a

3. In a typewriting machine, in combination, a base frame, a system of key levers terminating in a keyboard, an upwardly and"- rearwardly inclined segment member, an

arcuate pivot bail curved about the segment member and supported thereby having the lowermost portion of the are thereof at the level of a portion of the said key levers, type bars pivotally mounted upon said bail, connecting linkage from the key levers to the type bars, universal means associated with said segment member, extending to the rear thereof and actuated from the type bars for oblique movement substantially at right angles to said segment member, and escapement mechanism to the rear of said segment member actuated from said universal means.

4. In a typewriting machine, the combination of a main frame, a transverse upstanding plate supported in the frame, a carriage bed at the rear of the plane of said plate, a platen carriage'mounted on the bed to travel endwise, a platen on the carriage, said carriage and platen located back of the plane of said plate, an arcuate series of type bars normally extending forward from said plate, means ifor pivotally supporting the type bars ad- 'acent their rear ends on said plate with the. pivots of the series of bars in an arc'lying in a plane parallel with the plane of the late, a system of key levers extending foreand-aft of the machine carry-fig y at their forward ends, the lowermost point of the arc of the type bar pivots being located above and close to the rear portions of the key levers and said rear portions of the key levers lying close to the plane of the bottom of the main frame and below the keys, and a universal bar mechanism supported entirely on the plate and includng an arcuate member curved adjacent the series of type bar pivots in position to be engaged by the leading edges of the type bars close to the type bar heels when the keys are depressed, operating connections between the key levers and the type bars, and an escapement mechanism under the carriage,

: said universal bar mechanism having an open structure arranged to afford a space under the carriage bed and back of the plate between the front and rear portions of said universal bar mechanism into which other parts of the machine extend.

5. In a typewriting machine, the combination ofa main frame, a transverse upstanding plate supported in the frame, a carriage bed at the rear of the plane of said plate, a

platen carriage mounted on the bed to travel endwise, a platen on the carriage, said carriage and platen located back of the plane of said plate, an arcuate series of type bars normally extending forward from said plate, means for pivotally supporting the type bars adjacent their rear ends on said plate with the pivots ofthe series of bars in an are lying in a plane parallel with the plane ofthe plate, a system of key levers extending fore-and-aft of the machine carrying keys at their forward ends, the lowermost point of the arc of the type bar pivots being located above and close to the rear portion of the key levers and said rear portions of the key levers lying close to the plane of the bottom of the main frame and below the keys, connecting linkage between the key levers and the type bars, a

carriage escapement mechanism located back i of the said plate and'forward of the vertical plane of the rear edge of the carriage, and a universal mechanism supported in its entirety on said plate, said universal mechanism including an arcuate member associated with said plate for actuation by the type bars and parts located at the rear of said plate defining an open space under the carriage bed into which other parts of the machine are received.

6. In a typewriting machine, the combina tion of a main frame, a transverse upwardly and rearwardly inclined plate near the rear of the main frame, an arcuate series of type bars pivotally supported on said plate and normally extending forwardly, a system of key levers extending fore-and-aft of the machine and fulcrumed in the frame, said key levers carrying keys at their forward ends and having downwardly and rcarwardly inclined portions, the centralftype bars lying close to the inclined portions'of the central key levers and having their pivots close to the upper edges of the central key levers, a platen carriage and platen located to the rear of the plane of said plate, connecting linkage between the key levers and the type bars to swing the type bars to an upwardly and rearwardly inclined platen-striking position, a carriage support upon which the carriage is mounted for letter-space movements, a carriage escapement, and universal means for actuating said escapement including an arcuate member arranged in a curve adjacent the type bar pivots parallel with said plate for actuation by the type bars and supported wholly on said plate for oblique movement lIi a path substantially at a right angle to said p ate. Q 7 In a typewriting machine, the combination of a low relatively flat mainframe, a

being disposed below the highest part of theframe, an upwardly and rearwardly inclinedtype bar supporting plate in the frame disposed below the level of the highest part of the frame, a platen carriage and support therefor located between the vertical plane of the rear end of the frame and the plane of said plate, a platen on the carriage at the rear of the plane of said plate, type bars pivotally supported on said plate and normally extending upwardly and forwardly therefrom, connections between the keys and type bars for swinging the type bars to upwardly and rearwardly inclined platen-striking positions, escapement mechanism located under the carriage and adjacent the plate, a universal bar supported. on the rear side of said plate for downward and rearward movement by the type bars and associated with the escapement mechanism for actuating said mechanism.

being disposed below the highest part of the frame, an upwardly and rear'wardly inclined type bar supporting plate in the frame disposed below the level of the highest part of the frame, a platen carriage and support 8. In a typewriting machine, the combina-- therefor located between the vertical plane Y of the rear end of the frame and the plane of said plate, a platen on the carriage at the rear. of the plane of said plate, type bars pivotally supported on said plate and normally extending upwardly and forwardly therefrom, connections between the keys and the type bars for swinging the type bars to upwardly and rearwardly inclined platen-striking positions, escapement mechanism located under the carriage adjacent the plate and rear on said plate for downward and rearward movement by the type bars and associated end of the frame, a universal bar supported with the escapement mechanism for actuating said mechanism, and ribbon supporting devices mounted on the frame between the transverse planes of said plate and the for-ward ends of the type bars and between the horizontal planes of the top of the platen and the bottom of the main frame.

9. In a typewriting machine the combination of a main frame, key levers pivotally supported between their ends in the forward part of said frame and having rearwardly versal meansassociated with. said plate and the type bars for movement by the type bars, and a member within the frame behind said member movable by the universal means and disposed to engage the rigid pawl between its pivot and nose to vibrate the pawls.

10. Ina typewriting machine, in combination, a base frame, a system of parallel key levers terminating in a keyboard, a segment plate thereon, a universal bar mounted on said se ment plate and extending to the rear thereo a bail curved about said universal bar and segment plate and having the lowermost portion of the arc thereof at the level of portions of said key levers, type bars pivotally mounted upon said bail, a carriage base plate, a frame secured to said carriage base plate, an escapement mechanism mounted in said frame, said universal bar having an open structure to afford space adjacent said escapement mechanism when the carriage is applied to the base frame.

11. In a typewriting machine, in combination, a base frame, a system of key levers terminating in a keyboard, an inclined segment plate, a bail curved thereabout having the lowermost portion of the arc thereof located above and close to the rear portions of said key levers, type bars pivotally mounted upon said bail, connecting linkage from the key levers to the rear ends of the type bars, a universal bar associated with said segment plate, extending to the rear thereof and ac tuated from the type bars for oblique movement substantially at right angles to said segment plate mechanism actuated by said universal bar comprising parts pivotally supported on the rear of said segment plate and escapement. mechanism adjacent said plate and spaced from the rear end of said base frame and actuated by said universal mechanism parts.

12; In a typewriting machine, in combination, a base frame, a system of key levers terminating in a keyboard, an upwardly and rearwardly inclined segment plate, a bail in curved arrangement thereon having the lowermost portion of the arc thereof located above and close to the rear portions of said v key levers, type bars pivotally mounted upon said bail, connecting linkage from the key levers to the rear ends of the type bars, a typebar-actuated universal bar associatedwith,

said segment plate and having spaced portions extending to the rear thereof, universal bar mechanism on the rear side of said plate having spaced pivotally movable armssupporting said universal bar portions, escapement mechanism located in rear of said plate opposite the center of thespace between said 1 universal mechanism arms and means for connectlng said umversal bar mechanism with said escapement mechanism for actuating the latter.

13. In a typewriting machine, the combination of a base frame, a segment plate thereon, a universal bar ad] acent said plate, a carriage base plate, a frame secured to said carriage engage said rigid pawl between its pivot and nose to vibrate the same.

I GEORGE F. ROSE. 

